Submodule 'components/coap/libcoap' fails to clone: missing commit 0dbccca06c3ea75a20ef0a51633eb424a35b5e2a (GIT8266O-889)

[rminnasiri]

Checklist

• Checked the issue tracker for similar issues to ensure this is not a duplicate
• Read the documentation to confirm the issue is not addressed there and your configuration is set correctly
• Tested with the latest version to ensure the issue hasn't been fixed

How often does this bug occurs?

always

Expected behavior

I expected git submodule update --init --recursive to fetch all submodules successfully,
including components/coap/libcoap, without any errors.

Actual behavior (suspected bug)

The submodule components/coap/libcoap fails to clone because the required commit
0dbccca06c3ea75a20ef0a51633eb424a35b5e2a does not exist in the repository.

Error logs or terminal output

fatal: remote error: upload-pack: not our ref 0dbccca06c3ea75a20ef0a51633eb424a35b5e2a
fatal: Fetched in submodule path 'components/coap/libcoap', but it did not contain 
0dbccca06c3ea75a20ef0a51633eb424a35b5e2a. Direct fetching of that commit failed.

Steps to reproduce the behavior

1. git clone --recurse-submodules https://github.com/espressif/ESP8266_RTOS_SDK.git
2. cd ESP8266_RTOS_SDK
3. git submodule update --init --recursive

The error appears during step 3.

Project release version

latest

System architecture

Intel/AMD 64-bit (modern PC, older Mac)

Operating system

Linux

Operating system version

Ubuntu 22.04 (WSL2)

Shell

Bash

Additional context

• The referenced commit does not exist on libcoap upstream.
• It also does not exist on the mirror used by the SDK (jihulab.com/esp-mirror/...).
• This prevents a clean checkout of the SDK and blocks the build process.
• Removing the submodule manually is the only workaround.